Window operator

Abstract

A window operator and assembly method therefor wherein a stacked pull arm and gear are rotatably mounted on a bushing carried by a mounting base and the gear and pull arm are assembled to the mounting base with a controlled clearance independent of the tolerance of these components by use of a hardened metal bushing. The hardened metal bushing is forced into the deformable metal of the mounting base whatever distance is necessary to locate an exposed end of the bushing a fixed distance beyond the uppermost of said gear and pull arm and provide a surface against which a washer may be mounted and which overlies the pull arm and gear to hold the components in assembled relation with the controlled clearance.

We claim: 
     
       1. A window operator having controlled clearance between components, said components including a mounting base of deformable metal, a gear and a pull arm each having an opening and which are in stacked relation, a pin fixed to the mounting base, a hardened metal bushing on said pin and extended through said openings, and a washer fitted onto said pin and engaging said bushing, said hardened metal bushing having a bevelled end pressed into and deforming the metal of said mounting base to have an exposed end of the hardened metal bushing a predetermined distance beyond the uppermost of said stacked gear and pull arm. 
     
     
       2. The window operator of claim 1 wherein said mounting base has a wall which is deformed by the bushing and the wall has a Crecess defining a space into which the mounting base metal flows upon said wall being deformed by the bushing. 
     
     
       3. The window operator of claim 2 wherein there are a plurality of said recesses in a circular array to underlie the bevelled end of said hardened metal bushing.